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(11)

EP 3 980 806 A1

(12)

(43) Date of publication: 13.04.2022 Bulletin 2022/15 (21) Application number: 20760598.1 (22) Date of filing: 29.05.2020

(51) International Patent Classification (IPC):  G01S 7/481(2006.01) B32B 17/06(2006.01) C03C 3/091(2006.01) C03C 3/083(2006.01) G02B 1/14(2015.01) C03C 17/34(2006.01) C03C 3/089(2006.01) (52) Cooperative Patent Classification (CPC): G01S 7/4813; G02B 1/14; C03C 17/3435; G02B 1/115; C03C 2217/734; C03C 17/3411 (86) International application number: PCT/US2020/035034 (87) International publication number: WO 2020/247245 (10.12.2020 Gazette 2020/50)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 05.06.2019 US 201962857507 P (71) Applicant: Corning Incorporated Corning, New York 14831 (US)

(72) Inventors: HART, Shandon Dee Elmira, New York 14905 (US) KOCH III, Karl William Elmira, New York 14903 (US) KOSIK WILLIAMS, Carlo Anthony Painted Post, New York 14870 (US) PAULSON, Charles Andrew Painted Post, New York 14870 (US) PRICE, James Joseph Corning, New York 14830 (US) (74) Representative: Epping - Hermann - Fischer  Patentanwaltsgesellschaft mbH Schloßschmidstraße 5 80639 München 80639 München (DE)